body{
    background-image: url(../images/bg.jpg);
    background-repeat:no-repeat;
    background-size:  cover;
}
button{
    padding: 0;
    margin: 0;
    border: 0;
    width: 80px;
    height: 40px;
    line-height: 40px;
    font-size: 15px;
    border-radius: 30px;
}
a{
    margin: 20px;
    text-decoration: none;
    float: right;
    font-size: 30px;
    font-weight: 700;
    color: aliceblue;
    text-shadow: 5px 5px 5px rgba(0, 0, 0, .9);
}
table {
    width: 800px;
    margin: 100px 200px;
    border-collapse: collapse;
    text-align: center;
}


td,
th {
    border: 1px solid #000;
    height: 40px;
    background-color: rgba(250, 248, 248, 0.5);
}

thead tr {
    height: 40px;
    background:#176bb0 ;
}

table tr:nth-child(even) {
    background: #34bffa;
}
